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Theory of Structures - Engineering

Q1:

A bar l metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is

A

B

C

D

ANS:D -

Strain energy formula = {( sigma) ^2/(2E) }*Volume.
= {( sigma) ^2/(2E) }*A*L.
= {(W/A) ^2/(2E) }*A*E.
== {W^2L/(2AE) }.